Study On A New Adsorption Desulfurizing Agent For Gas Oil

People continue to strengthen environmental protection consciousness, thedesulfurization technology application in many ways, be taken seriously, especiallygasoline. Ways to reduce sulfur content in gasoline today there are a lot of mainly:hydrogenation desulfuration technique and non hydrogenation desulfurizationtechnology. But the hydrodesulfurization technology has more stringent requirements,including hydrodesulfurization technology requirement is:1Hydrogen environment,precious metal catalyst, high pressure and high temperature and so on a series of harshoperating conditions.2The equipment investment and operation cost ratio is relativelyexpensive.3For some sulfide sulfide thiophene and its derivatives (polycyclic) removalis relatively difficult.And adsorption desulfurization technology is a novel and effectiveto the good method of removing sulfide in FCC gasoline, its advantages are: lessinvestment cost, simple operation, no pollution and is suitable for deep desulfurization,etc. A new technology that has a very broad space for development and applicationprospect.This paper is to use activated carbon (60%~80%) as the carrier, the asphalt for hightemperature coal caking agent (8%~12%), sodium hydroxide as the additives (24%~28%), sulfonated phthalein wellknown cobalt as the active component (3%~5%), thearticle through purification, ingredients, kneading, extrusion, molding process, thepreparation of A series of adsorption desulfurization agent samples (A, B, C). By themethod of the fixed bed dynamic adsorption desulfurization agent adsorptionperformance evaluation. Respectively, the effects of the variety of binder, selection ofactive sulfide and proportion in the catalyst, dry temperature (120℃--120℃) and time(8h-12h), activation temperature (400℃-400℃) and time (3h-4h), oil than factorsaffect the performance of adsorption desulfurization agent, and desulfurization effect oftwo kinds of raw oil respectively were compared. Selection of the optimum adsorptiondesulfurization, and the best adsorbent preparation conditions, adsorption desulfurizationtechnology for the future in terms of industrial application, provide the certain referencevalue.The research results show that activated carbon sorbents can effectively removing the sulfur compounds in gasoline. Using coal tar, wood sodium sulfonate, pulp wasteliquid, such as starch solution as the binder on the modified activated carbon. Modifiedactivated carbon performance test results show that high temperature of the asphaltmodified activated carbon in the carbon content (90%), specific surface area (1510m2/g) and intensity (230n/cm), three factors are the dominant, so choose the asphalt as hightemperature binder.Active component selection research results show that comparing polyphthalocyanine cobalt, sulfonated phthalocyanine cobalt, zinc oxide, ferric oxide,calcium oxide and other active component content of hydrogen sulfide and mercaptansulfur content, sulfonated phthalocyanine cobalt and cobalt phthalocyanine effect isbetter, with sulfonated phthalocyanine cobalt for optimal,11PPM levels of hydrogensulphide, mercaptan sulfur content9PPM. Sulfonated phthalocyanine cobalt indetermination of proportion in the catalyst, by changing the sulfonated phthalocyaninecobalt catalyst in proportion, the determination of catalyst pore volume, specific surfacearea, to determine the mechanical strength, the results show that sulfonatedphthalocyanine cobalt adding proportion between3-5%is more appropriate, the catalystpore volume of0.44to0.42ml/g, catalyst, specific surface area of1534-1534m2/gcatalyst strength241-247n/cm.Made A series of catalyst samples in reaction temperature40℃, volumetric spacevelocity was1.5h-1,100ml small evaluation device fixed bed reactor in the inspection,the fixed bed dynamic adsorption desulfurization evaluation results show that A sampletest results: raw oil A mercaptan sulfur from42PPM down to5PPM, raw material oil ofmercaptan sulfur from48PPM reduced to4PPM. Testing results of sample B: rawmaterial oil a mercaptan sulfur reduced to7PPM from42PPM, raw material oil2thiolsulfur from48reduced to10PPM PPM. C sample test results: makes the raw materialoil a42PPM to7PPM reduction, reduce raw material oil two48PPM to9PPM.Comparing the three test results, A sample of good performance, and the catalystcompared with other two kinds of catalysts its desulfurization effect significantly.